JPH0242295A - Pipe joint and slip-off preventing ring for pipe joint - Google Patents

Pipe joint and slip-off preventing ring for pipe joint

Info

Publication number
JPH0242295A
JPH0242295A JP63191709A JP19170988A JPH0242295A JP H0242295 A JPH0242295 A JP H0242295A JP 63191709 A JP63191709 A JP 63191709A JP 19170988 A JP19170988 A JP 19170988A JP H0242295 A JPH0242295 A JP H0242295A
Authority
JP
Japan
Prior art keywords
pipe
joint
composite pipe
ring
main body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP63191709A
Other languages
Japanese (ja)
Other versions
JP2569354B2 (en
Inventor
Taichiro Nagura
名倉　太一郎
Shigeru Ando
茂 安藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHIYUUGOU JIYUUTAKUYOU SHINZAIRIYOU KIKI SYST KAIHATSU GIJUTSU KENKYU KUMIAI
Sekisui Chemical Co Ltd
Original Assignee
SHIYUUGOU JIYUUTAKUYOU SHINZAIRIYOU KIKI SYST KAIHATSU GIJUTSU KENKYU KUMIAI
Sekisui Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHIYUUGOU JIYUUTAKUYOU SHINZAIRIYOU KIKI SYST KAIHATSU GIJUTSU KENKYU KUMIAI, Sekisui Chemical Co Ltd filed Critical SHIYUUGOU JIYUUTAKUYOU SHINZAIRIYOU KIKI SYST KAIHATSU GIJUTSU KENKYU KUMIAI
Priority to JP63191709A priority Critical patent/JP2569354B2/en
Publication of JPH0242295A publication Critical patent/JPH0242295A/en
Application granted granted Critical
Publication of JP2569354B2 publication Critical patent/JP2569354B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52297—Joining tubular articles involving the use of a socket said socket comprising slip-off prevention means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Abstract

PURPOSE:To firmly hold a composite pipe and a joint body without slip off of the composite pipe from the joint body by a method wherein the joint body and the composite pipe are integrally fused together and a slip-off preventing ring is firmly secured to the composite pipe. CONSTITUTION:The end part of a composite pipe 10 is inserted in the through- hole of a lock part 22a of a fastening nut 22 and a slip-off preventing ring 23, and inserted in a gap between outer and inner cylinders 21a and 21b of a joint body 21. With this state, a fastening nut 22 is rotated to bring the lock part 22a into pressure contact with the slip-off preventing ring 23, and the end part of the composite pipe 10 is brought into pressure contact with the outer peripheral surface of the inner cylinder 21b. With a heat generating substance 21d energized, the outer and inner cylinders 21a and 21b and the composite pipe 10 are fused together. In this case, a space 23b made of heat fusible resin of the slip-off preventing ring 23 is simultaneously heated and fused by means of the heat generating substance 21d.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、金属管の少なくとも外周面が熱溶融性の合成
樹層で被覆された複合管が接続される管継手および管継
手用抜け止めリングに関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a pipe joint to which a composite pipe in which at least the outer peripheral surface of a metal pipe is coated with a heat-fusible synthetic tree layer is connected, and a retainer for the pipe joint. Regarding rings.

（従来の技術） 給水配管、給湯配管、ガス配管等に使用される合成樹脂
管は、接続される管継手との接続強度を高めるために、
近時１両者を熱融着により接続する方法が採用されてい
る。このような熱融着による管と管継手との接続構造は
、実公昭６０−２３５９６号公報、公表特許昭５５−５
００４７９号公報等に開示されている。これらの公報に
開示された管と管継手との接続構造は、いずれも接続す
べき合成樹脂管の端部外周面を、該端部が内嵌される管
継手の内周面に配設された発熱体により加熱し、該合成
樹脂管の端部外周面と、管継手内周面とを融着している
。(Prior art) Synthetic resin pipes used for water supply piping, hot water supply piping, gas piping, etc. are
Recently, a method has been adopted in which the two are connected by heat fusion. Such a connection structure between a pipe and a pipe joint by heat fusion is disclosed in Japanese Utility Model Publication No. 60-23596 and published patent No. 55-5.
This is disclosed in JP 00479 and the like. The connection structures between pipes and pipe fittings disclosed in these publications all have the outer circumferential surface of the end of the synthetic resin pipe to be connected arranged on the inner circumferential surface of the pipe fitting into which the end is fitted. The outer peripheral surface of the end of the synthetic resin pipe and the inner peripheral surface of the pipe joint are fused together by heating with a heating element.

（発明が解決しようとする課題） 最近では、金属管の内周面および外周面を合成樹脂層に
て被覆した複合管が耐蝕性、耐久性に優れているため、
給湯管等に使用されている。このような複合管を管継手
に接続する場合に、従来のように、管外周面と管継手内
周面とを熱融着すれば１両者は強固に接着される。この
ような状態で。(Problems to be Solved by the Invention) Recently, composite pipes in which the inner and outer peripheral surfaces of metal pipes are coated with synthetic resin layers have excellent corrosion resistance and durability.
Used for hot water pipes, etc. When such a composite pipe is connected to a pipe joint, the outer circumferential surface of the pipe and the inner circumferential surface of the pipe joint are thermally fused as in the conventional method, thereby firmly adhering the two together. In this condition.

例えば複合管内に流体が高圧で通流されると、複合管は
管継手から抜ける方向へ力が加わり、管継手に融着され
た外周側の合成樹脂層が管継手と共に複合管の金属管か
ら剥離するおそれがある。For example, when fluid is passed through a composite pipe at high pressure, a force is applied to the composite pipe in the direction of pulling it out of the pipe joint, and the outer synthetic resin layer fused to the pipe joint peels off from the metal pipe of the composite pipe together with the pipe joint. There is a risk of

本発明は上記従来の課題を解決するものであり。The present invention solves the above-mentioned conventional problems.

その目的は、外周面が樹脂層にて被覆された複合管を強
固に接合し得ると共に、該複合管を確実に抜け止めし得
て、しかも複合管の樹脂層が金属管から剥離するおそれ
のない管継手を提供することにある。本発明の他の目的
は、外周面が樹脂層にて被覆された複合管が接続される
管継手に用いて好適な管継手用抜け止めリングを提供す
ることにある。The purpose of this is to firmly join composite tubes whose outer peripheral surfaces are coated with a resin layer, to reliably prevent the composite tube from coming off, and to prevent the resin layer of the composite tube from peeling off from the metal tube. Our goal is to provide pipe fittings that are not available. Another object of the present invention is to provide a retaining ring for a pipe joint that is suitable for use in a pipe joint to which a composite pipe whose outer peripheral surface is coated with a resin layer is connected.

（課題を解決するための手段） 本発明の管継手は、金属管の少なくとも外周面が熱熔融
性樹脂層にて被覆された複合管の端部に外嵌され、少な
くとも該端部を外嵌する部分が熱溶融性樹脂製であって
、その部分に発熱体が配設された継手本体と、該継手本
体に内嵌された複合管の端部に外嵌し得るように、該継
手本体と同心状に配設され１周方向の一部が分割されそ
の分割部の端面同士が接近し得る弾性を有する円環状の
リング本体部、および該リング本体部が拡径された状態
でその分割部に介装された熱溶融性樹脂製のスペーサを
有する抜け止めリングと、を具備し。(Means for Solving the Problems) The pipe joint of the present invention is fitted onto the end of a composite pipe in which at least the outer circumferential surface of the metal pipe is coated with a hot-melt resin layer, a joint body in which a heating element is disposed in the heat-melting resin; an annular ring body disposed concentrically with the ring body and having an elasticity that allows the end faces of the divided parts to approach each other, with a part of the circumferential direction being divided; and a retaining ring having a spacer made of heat-melting resin interposed in the part.

前記発熱体の発熱により複合管の端部と咳端部に外嵌さ
れた継手本体部分とが融着されると共に。Due to the heat generated by the heating element, the end of the composite pipe and the joint main body portion fitted onto the cough end are fused together.

該抜け止めリングのスペーサが溶融されてなりそのこと
により上記目的が達成される。The spacer of the retaining ring is melted, thereby achieving the above object.

また３本発明は、管継手内に配設されており。Further, the third aspect of the present invention is disposed within a pipe joint.

金属管の少なくとも外周面が熱溶融性樹脂層で被覆され
た複合管が、該管継手内に挿入された場合に、該複合管
に外嵌して該複合管を該管継手から抜け止めする管継手
用抜け止めリングであって。When a composite pipe in which at least the outer peripheral surface of the metal pipe is coated with a heat-melting resin layer is inserted into the pipe joint, the composite pipe is fitted onto the composite pipe to prevent the composite pipe from slipping out from the pipe joint. A retaining ring for pipe fittings.

周方向の一部が分割されその分割部の端面同士が接近し
得る弾性を有する円環状のリング本体部と。An annular ring main body part that is partially divided in the circumferential direction and has elasticity that allows the end surfaces of the divided parts to approach each other.

該リング本体部が拡径された状態でその分割部に介装さ
れた熱溶融性樹脂製のスペーサと、を具備し、前記複合
管が該リング本体部内に嵌合された際に、該スペーサが
加熱溶融されてなり、そのことにより上記目的が達成さ
れる。A spacer made of a hot melt resin is inserted between the divided portions of the ring main body when the diameter thereof is expanded, and when the composite pipe is fitted into the ring main body, the spacer is heated and melted, thereby achieving the above object.

（実施例） 以下に本発明を実施例について説明する。(Example) The present invention will be described below with reference to Examples.

第１図は１本発明の管継手と複合管との接続構造を示す
縦断面図である。複合管１０は１例えばアルミニウム製
の金属管１１の内周面および外周面が。FIG. 1 is a longitudinal sectional view showing a connection structure between a pipe joint and a composite pipe according to the present invention. The composite pipe 10 has an inner circumferential surface and an outer circumferential surface of a metal tube 11 made of aluminum, for example.

それぞれ熱溶融性の合成樹脂層１２および１３にて被覆
されている。They are coated with heat-fusible synthetic resin layers 12 and 13, respectively.

該複合管１０の端部が接合される管継手２０は、直管状
の継手本体２１と、該継手本体２１の一端部に螺合され
た締込みナツト２２とを有する。The pipe joint 20 to which the end of the composite pipe 10 is joined has a straight pipe-shaped joint main body 21 and a tightening nut 22 screwed into one end of the joint main body 21.

継手本体２１の一端部には、複合管１０の端部が嵌合し
得る間隙を有して外筒２１ａおよび内筒２１ｂが同軸状
に配設されている。そして、その間隙内に複合管１０の
端部が嵌合される。An outer cylinder 21a and an inner cylinder 21b are coaxially disposed at one end of the joint body 21 with a gap into which the end of the composite pipe 10 can fit. Then, the end of the composite pipe 10 is fitted into the gap.

該継手本体２１の他端部には、該内筒２１ｂの内径より
も若干大きい内径を有する接続部２１ｃが配設されてお
り、該接続部２１ｃの外周面にねし溝が形成されている
。そして、該接続部２１ｃを所定の機器等にねじ込むこ
とにより、管継手２０が、その機器に接続される。A connecting portion 21c having an inner diameter slightly larger than the inner diameter of the inner tube 21b is provided at the other end of the joint body 21, and a threaded groove is formed on the outer peripheral surface of the connecting portion 21c. . Then, by screwing the connecting portion 21c into a predetermined device, the pipe joint 20 is connected to the device.

このような継手本体２１は、熱溶融性樹脂にて一体的に
成形されている。Such a joint body 21 is integrally molded from a hot melt resin.

継手本体２１の一端部に配設された外筒２１ａおよび内
筒２１ｂには２例えばニクロム線でなる発熱体２１ｄが
埋設されている。該発熱体２１ｄは、その発熱により、
外筒２１ａの内周部および内筒２１ｂの外周部を全体に
わたって加熱し得て、かつ９外筒２１ａの先端部も確実
に加熱されるように配置される。A heating element 21d made of, for example, nichrome wire is embedded in an outer cylinder 21a and an inner cylinder 21b disposed at one end of the joint body 21. The heating element 21d, due to its heat generation,
The arrangement is such that the inner peripheral part of the outer cylinder 21a and the outer peripheral part of the inner cylinder 21b can be heated entirely, and the tip of the outer cylinder 21a can also be reliably heated.

該発熱体２１ｄは、外筒２１ａおよび内筒２１ｂの基端
部から外部へ延出されており、該発熱体２１ｄの各端部
間に電圧を印加することにより、該発熱体２１ｄは発熱
する。該発熱体２１ｄは２例えば、外筒２１ａの内周面
および内筒２１ｂの外周面に沿うて、軸方向に適当な間
隔をあけて巻回されている。該発熱体２１ｄは巻回する
ことなく、外筒２１ａおよび内筒２１ｂの軸方向全体に
わたる間隔でジグザグ状に配設してもよい。The heating element 21d extends outward from the base ends of the outer cylinder 21a and the inner cylinder 21b, and by applying a voltage between each end of the heating element 21d, the heating element 21d generates heat. . The heating element 21d is wound around the inner circumferential surface of the outer tube 21a and the outer circumferential surface of the inner tube 21b at appropriate intervals in the axial direction, for example. The heating element 21d may be arranged in a zigzag pattern at intervals over the entire axial direction of the outer cylinder 21a and the inner cylinder 21b without being wound.

継手本体２１における外筒２１ａの先端部外周には。On the outer periphery of the tip of the outer cylinder 21a of the joint body 21.

ねじ溝が形成されており、該ねじ溝に締込みナツト２２
が螺合している。該締込みナツト２２は、一端が開放さ
れ、その開放端が若干先細り状に縮径された円筒状をし
ており、その開放端側の内周面にねし溝が形成されてい
る。該締込みナツト２２の他端には、中央部に複合管１
０の外径より若干大きい外径の透孔が形成された係止部
２２ａが設けられている。該締込みナツト２２は、その
開放端から継手本体２０の外筒２１ａに外嵌され、外筒
２１ａにおける外周面のねじ溝と締込みナット２２内周
面のねし溝とが螺合される。そして締込みナツト２２が
外筒２１ａに締込まれることにより、外筒２１ａは除々
に縮径される。A thread groove is formed, and a nut 22 is tightened into the thread groove.
are screwed together. The tightening nut 22 has a cylindrical shape with one end open, the diameter of which is slightly tapered, and a threaded groove is formed on the inner peripheral surface of the open end. At the other end of the tightening nut 22, there is a composite pipe 1 in the center.
A locking portion 22a is provided in which a through hole having an outer diameter slightly larger than the outer diameter of 0 is formed. The tightening nut 22 is externally fitted into the outer cylinder 21a of the joint body 20 from its open end, and the thread groove on the outer peripheral surface of the outer cylinder 21a and the thread groove on the inner peripheral surface of the tightening nut 22 are screwed together. . Then, by tightening the tightening nut 22 into the outer cylinder 21a, the diameter of the outer cylinder 21a is gradually reduced.

継手本体２１の外筒２１ａ先端と、該外筒２１ａに螺合
された締込みナツト２２の係止部２２ａとの間には抜け
止めリング２３が配設されている。該抜け止めリング２
３は、第２図に示すように２周方向の一部が分割された
円環状のリング本体部２３ａと、該リング本体部２３ａ
を拡径してその離隔された分割部内に介在された熱溶融
性樹脂製のスペーサ２３ｂとを有する。リング本体部２
３ａは、スペーサ２３ｂがはずされると、自身の弾性力
にて分割部が当接するまで縮径される。該リング本体部
２３ａは、内周部が内方になるに連れて先細り状に尖っ
ている。A retaining ring 23 is disposed between the tip of the outer cylinder 21a of the joint body 21 and the locking portion 22a of the tightening nut 22 screwed onto the outer cylinder 21a. The retaining ring 2
3, as shown in FIG. 2, an annular ring main body part 23a which is partially divided in two circumferential directions, and the ring main body part 23a.
The spacer 23b is made of a heat-melting resin and is interposed within the spaced divided portion with an enlarged diameter. Ring body part 2
When the spacer 23b is removed, the diameter of the spacer 3a is reduced by its own elastic force until the divided portions come into contact with each other. The ring main body portion 23a has an inner circumferential portion tapered toward the inside.

該リング本体部２３ａは、アルミニウム、銅９ステンレ
ス等の金属が用いられるが、複合管１０における金属管
１１と同種のものが好ましい。もし、該金属管１１とリ
ング本体部２３ａとが異なる種類の金属であれば、外部
環境により、金属管ＩＩあるいはリング本体部２３ａが
電気化学的に腐蝕するおそれがある。The ring main body portion 23a is made of metal such as aluminum, copper 9 stainless steel, etc., but the same type of metal as the metal tube 11 in the composite tube 10 is preferable. If the metal tube 11 and the ring body 23a are made of different metals, the metal tube II or the ring body 23a may be electrochemically corroded by the external environment.

このような構成の管継手２０は、複合管１０の端部とは
次のように接合される。まず、締込みナツト２２を継手
本体２１の外筒２１ａに緩（螺合しておく。The pipe joint 20 having such a configuration is joined to the end of the composite pipe 10 as follows. First, the tightening nut 22 is loosely screwed into the outer cylinder 21a of the joint body 21.

このような状態で、複合管１０の端部を、締込みナツト
２２の係止部２２ａの透孔および抜け止めリング２３内
に挿通させて、外筒２１ａと円筒２１ｂの間隙内に挿入
する。そして、該複合管１０の端面を外筒２１ａと内筒
２１ｂとの間隙内の奥部に当接させる。このような状態
で締込みナツト２２を回転させて、その係止部２２ａが
抜け止めリング２３に当接するようにねじ送りする。こ
れにより、外筒２１ａは締込みナツト２２により締付け
られて、締込みナツト２２が螺合した部分から順次縮径
される。その結果、外筒２１ａと内筒２１ｂとの間隙内
に挿入された複合管１０の端部は、その外周面が外筒２
１ａ内周面に圧接されると共に、その内周面が内筒２１
ｂの外周面に圧接される。In this state, the end of the composite tube 10 is inserted through the through hole of the locking portion 22a of the tightening nut 22 and into the retaining ring 23, and inserted into the gap between the outer tube 21a and the cylinder 21b. Then, the end surface of the composite pipe 10 is brought into contact with the inner part of the gap between the outer cylinder 21a and the inner cylinder 21b. In this state, the tightening nut 22 is rotated and screwed so that the locking portion 22a thereof comes into contact with the retaining ring 23. As a result, the outer cylinder 21a is tightened by the tightening nut 22, and its diameter is sequentially reduced from the portion where the tightening nut 22 is screwed. As a result, the end of the composite pipe 10 inserted into the gap between the outer cylinder 21a and the inner cylinder 21b has an outer peripheral surface that is similar to that of the outer cylinder 21b.
1a, and the inner circumferential surface is pressed against the inner circumferential surface of the inner cylinder 21.
It is pressed against the outer peripheral surface of b.

次いで、外筒２１ａ内および内筒２Ｌｂ内に配設された
発熱体２１ｄに通電して、該発熱体２１ｄを発熱させる
。これにより、熱溶融性樹脂製の外筒２１ａおよび内筒
２１ｂが加熱溶融されると共に、複合管１０の外周面お
よび内周面の熱溶融性樹脂Ｊｉ１２および１３も加熱溶
融され９両者は融着される。Next, electricity is applied to the heating elements 21d disposed in the outer cylinder 21a and the inner cylinder 2Lb to generate heat. As a result, the outer cylinder 21a and the inner cylinder 21b made of heat-melting resin are heated and melted, and the heat-melting resins Ji12 and 13 on the outer peripheral surface and inner peripheral surface of the composite pipe 10 are also heated and melted, and the two are fused together. be done.

このとき、抜け止めリング２３の熱溶融性樹脂製のスペ
ーサ２３ｂも同時に発熱体２１ｄにより加熱されて溶融
される。これにより、リング本体部２３ａは、それ自身
の弾性力にて縮径し、該リング本体部２３ａは、複合管
１０外周面の加熱溶融された熱溶融性樹脂層１２内に入
り込む。そして、該リング本体部２３ａは、複合管１ｏ
の金属管１１内に喰い込んだ状態となる。At this time, the heat-melting resin spacer 23b of the retaining ring 23 is also heated and melted by the heating element 21d at the same time. As a result, the ring main body 23a contracts in diameter by its own elastic force, and the ring main body 23a enters the heat-melted thermofusible resin layer 12 on the outer peripheral surface of the composite pipe 10. The ring main body portion 23a is a composite pipe 1o.
It is in a state where it is bitten into the metal tube 11.

このような状態で、管継手２０および複合管１０内に上
水等が通流される。このとき、その通流水により、複合
管１０が継手本体２０から抜ける方向に力が加わるが、
該複合管１０は抜け止めリング２３に強固に係止され、
かつ該抜け止めリング２３が締込みナツト２２の係止部
２２ａに係止されるため、該複合管１０は管継手２０か
ら複合管１０の外周側の樹脂層１２が金属管１１から剥
離するおそれもない。また、複合管１０内周面と内筒２
１ｂ外周面が一体的に融着されると共に、複合管１０外
周面と外筒２１ａ内周面が一体的に融着されているため
、管継手２０と複合管１０との接合部において漏水のお
それがない。しかも、複合管１０の金属管１１は水に接
触せず腐蝕するおそれがない。In such a state, clean water or the like flows through the pipe joint 20 and the composite pipe 10. At this time, the flowing water applies force in the direction in which the composite pipe 10 comes out from the joint body 20, but
The composite pipe 10 is firmly locked to a retaining ring 23,
In addition, since the retaining ring 23 is locked to the locking portion 22a of the tightening nut 22, there is a risk that the resin layer 12 on the outer peripheral side of the composite pipe 10 may peel off from the metal pipe 11 from the pipe joint 20. Nor. In addition, the inner peripheral surface of the composite pipe 10 and the inner cylinder 2
Since the outer peripheral surface of 1b is integrally fused and the outer peripheral surface of the composite pipe 10 and the inner peripheral surface of the outer cylinder 21a are integrally fused, water leakage does not occur at the joint between the pipe joint 20 and the composite pipe 10. There is no fear. Furthermore, the metal tube 11 of the composite tube 10 does not come into contact with water and is free from corrosion.

複合管１０における金属管１１を被覆する熱溶融性の樹
脂層１２および１３としては、ポリエチレン、ポリプロ
ピレン、ポリブテンなどのオレフィン系樹脂、あるいは
これらの樹脂の混合物や共重合体が使用される。特に、
架橋オレフィン系樹脂が金属との接着力が大きく、好適
である。As the heat-melting resin layers 12 and 13 that cover the metal tube 11 in the composite tube 10, olefin resins such as polyethylene, polypropylene, and polybutene, or mixtures or copolymers of these resins are used. especially,
Crosslinked olefin resins have a high adhesive strength with metals and are therefore suitable.

管継手２０における継手本体２】も、複合管１０におけ
る樹脂層１２およびＩ３と同様の合成樹脂が用いられる
。The joint body 2 of the pipe joint 20 is also made of the same synthetic resin as the resin layers 12 and I3 of the composite pipe 10.

なお、上記実施例では、ねじ込み式で直管タイプの管継
手２０について説明したが１本発明はこのようなものに
限定されるものではなく、フランジタイプ、ソケットタ
イプ、チーズタイプ、エルボタイプ等の管継手でもよい
。また、抜け止めリング２３は継手本体２１と締込みナ
ツト２２との間に設ける構成としたが、継手本体２１内
に配設する構成としてもよい。In the above embodiment, a screw-in type straight pipe type pipe joint 20 was explained, but the present invention is not limited to such a pipe joint 20. It can also be a pipe joint. Further, although the retaining ring 23 is provided between the joint body 21 and the tightening nut 22, it may be provided within the joint body 21.

さらに、抜け止めリング２３は、第３図に示すようにリ
ング本体部２３ａの内周面に、内方へ突出する係止部２
３ｃを、適当な間隔をあけて複数配設する構成としても
よい。Furthermore, as shown in FIG.
A plurality of 3c may be arranged at appropriate intervals.

（発明の効果） 本発明の管継手は、このように、継手本体と複合管とが
一体的に融着されると共に、抜け止めリングが強固に複
合管に係止されるため、複合管を継手本体から抜けるこ
となく強固に保持し得る。(Effects of the Invention) In this way, in the pipe joint of the present invention, the joint main body and the composite pipe are integrally fused together, and the retaining ring is firmly locked to the composite pipe. It can be firmly held without coming off from the joint body.

本発明の抜け止めリングは、管継手と複合管とを確実に
かつ強固に接合し得る。The retaining ring of the present invention can reliably and firmly join a pipe joint and a composite pipe.

４、　゛の　　　な量日 第１図は本発明の管継手の一例を示す縦断面図。4. The amount of days FIG. 1 is a longitudinal sectional view showing an example of the pipe joint of the present invention.

第２図は抜け止めリングの一例を示す正面図、第３図は
抜け止めリングの他の例の正面図である。FIG. 2 is a front view showing an example of the retaining ring, and FIG. 3 is a front view of another example of the retaining ring.

１０・・・複合管、１１・・・金属管、　１２．１３・
・・熱溶融性樹脂層、２０・・・管継手、２１・・・継
手本体、２１ａ・・・外筒。10...Composite pipe, 11...Metal pipe, 12.13.
...Hot melt resin layer, 20...Pipe fitting, 21...Joint body, 21a...Outer cylinder.

２１ｂ・・・内筒、２１ｄ・・・発熱体、２２・・・締
込みナツト。21b...Inner cylinder, 21d...Heating element, 22...Tightening nut.

２３・・・抜け止めリング、２３ａ・・・リング本体部
、２３ｂ・・・スペーサ。23... Retention ring, 23a... Ring main body, 23b... Spacer.

第１図 以上Figure 1 that's all

Claims (1)

【特許請求の範囲】 １、金属管の少なくとも外周面が熱溶融性樹脂層にて被
覆された複合管の端部に外嵌され、少なくとも該端部を
外嵌する部分が熱溶融性樹脂製であって、その部分に発
熱体が配設された継手本体と、 該継手本体に内嵌された複合管の端部に外嵌し得るよう
に、該継手本体と同心状に配設され、周方向の一部が分
割されその分割部の端面同士が接近し得る弾性を有する
円環状のリング本体部、および該リング本体部が拡径さ
れた状態でその分割部に介装された熱溶融性樹脂製のス
ペーサを有する抜け止めリングと、を具備し、 前記発熱体の発熱により複合管の端部と該端部に外嵌さ
れた継手本体部分とが融着されると共に、該抜け止めリ
ングのスペーサが溶融される 管継手。 ２、管継手内に配設されており、金属管の少なくとも外
周面が熱溶融性樹脂層で被覆された複合管が、該管継手
内に挿入された場合に、該複合管に外嵌して該複合管を
該管継手から抜け止めする管継手用抜け止めリングであ
って、 周方向の一部が分割されその分割部の端面同士が接近し
得る弾性を有する円環状のリング本体部と、 該リング本体部が拡径された状態でその分割部に介装さ
れた熱溶融性樹脂製のスペーサと、を具備し、 前記複合管が該リング本体部内に嵌合された際に、該ス
ペーサが加熱溶融される 管継手用抜け止めリング。[Scope of Claims] 1. At least the outer circumferential surface of the metal tube is fitted onto the end of a composite tube coated with a layer of heat-melting resin, and at least the portion that fits the end is made of heat-melting resin. a joint body in which a heating element is disposed; and a joint body arranged concentrically with the joint body so as to be able to fit onto the end of the composite pipe fitted inside the joint body, An annular ring main body that is partially split in the circumferential direction and has elasticity that allows the end faces of the split parts to approach each other, and a thermal melting ring that is inserted in the split part with the ring main body expanded in diameter. and a retaining ring having a spacer made of a flexible resin, the end of the composite pipe and the joint main body portion externally fitted on the end are fused together by the heat generated by the heating element, and the retaining ring is provided with a spacer made of a flexible resin. A pipe fitting in which the ring spacer is melted. 2. When a composite pipe that is disposed inside a pipe joint and has at least the outer circumferential surface of the metal pipe covered with a layer of thermofusible resin is inserted into the pipe joint, the metal pipe does not fit externally into the composite pipe. A retaining ring for a pipe joint that prevents the composite pipe from coming off from the pipe joint, the ring body having an annular shape that is partially divided in the circumferential direction and having elasticity that allows the end surfaces of the divided parts to approach each other. , a spacer made of a heat-melting resin interposed between the divided portions of the ring main body in a state where the ring main body is expanded in diameter, and when the composite pipe is fitted into the ring main body, A retaining ring for pipe fittings in which the spacer is heated and melted.
JP63191709A 1988-07-30 1988-07-30 Fittings and retaining rings for fittings Expired - Lifetime JP2569354B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63191709A JP2569354B2 (en) 1988-07-30 1988-07-30 Fittings and retaining rings for fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63191709A JP2569354B2 (en) 1988-07-30 1988-07-30 Fittings and retaining rings for fittings

Publications (2)

Publication Number Publication Date
JPH0242295A true JPH0242295A (en) 1990-02-13
JP2569354B2 JP2569354B2 (en) 1997-01-08

Family

ID=16279174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63191709A Expired - Lifetime JP2569354B2 (en) 1988-07-30 1988-07-30 Fittings and retaining rings for fittings

Country Status (1)

Country Link
JP (1) JP2569354B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398974A (en) * 1991-04-19 1995-03-21 Sekisui Kagaku Kogyo Kabushiki Kaisha Pipe connecting member
US5489403A (en) * 1993-03-11 1996-02-06 Wilhelm Hegler Method for welding pipe pieces made of thermoplastics
FR2743525A1 (en) * 1996-01-17 1997-07-18 Toa Kokyu Tugitebarubu Seizo C Welding plastics sheets
WO1997049540A1 (en) * 1996-06-25 1997-12-31 Uponor B.V. Electrofusion fitting
GB2425337A (en) * 2005-04-22 2006-10-25 Uponor Innovation Ab Electrofusion fitting to seal barrier layer of composite pipe
JP2012002348A (en) * 2010-05-18 2012-01-05 Sekisui Chem Co Ltd Piping material and method of manufacturing the same
CN110005876A (en) * 2019-04-06 2019-07-12 河北宇通特种胶管有限公司 A kind of modeling glass-tube connection electric melting pipe fittings and connection method
US10357626B1 (en) 2013-07-23 2019-07-23 Bruce O. Baker Liner for a respirator mask

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013029169A (en) * 2011-07-28 2013-02-07 Bosai Kikaku:Kk Structure and method for connecting resin coated metal three-layer tube

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398974A (en) * 1991-04-19 1995-03-21 Sekisui Kagaku Kogyo Kabushiki Kaisha Pipe connecting member
US5489403A (en) * 1993-03-11 1996-02-06 Wilhelm Hegler Method for welding pipe pieces made of thermoplastics
EP0619176A3 (en) * 1993-03-11 1996-02-07 Wilhelm Hegler Process for welding thermoplastic pipes.
FR2743525A1 (en) * 1996-01-17 1997-07-18 Toa Kokyu Tugitebarubu Seizo C Welding plastics sheets
WO1997049540A1 (en) * 1996-06-25 1997-12-31 Uponor B.V. Electrofusion fitting
GB2425337A (en) * 2005-04-22 2006-10-25 Uponor Innovation Ab Electrofusion fitting to seal barrier layer of composite pipe
JP2012002348A (en) * 2010-05-18 2012-01-05 Sekisui Chem Co Ltd Piping material and method of manufacturing the same
US10357626B1 (en) 2013-07-23 2019-07-23 Bruce O. Baker Liner for a respirator mask
CN110005876A (en) * 2019-04-06 2019-07-12 河北宇通特种胶管有限公司 A kind of modeling glass-tube connection electric melting pipe fittings and connection method

Also Published As

Publication number Publication date
JP2569354B2 (en) 1997-01-08

Similar Documents

Publication Publication Date Title
US5169176A (en) Heat shrinkable clamping, connecting, repair, and reinforcing sleeve and method of use
US20020008382A1 (en) Combination mechanical/fusion pipe fitting
JPS6311328A (en) Molded form of thermoplastic material
KR200393028Y1 (en) Apparatus for connecting pipe
JP2000074281A (en) Pipe end connecting joint
JPH0242295A (en) Pipe joint and slip-off preventing ring for pipe joint
JPH06331080A (en) Flexible pipeline
JP3556272B2 (en) Elastic tube connection
JPH01238794A (en) Connection structure for duplex tube and tube fitting
JPH01303398A (en) Joint for connecting thin-diameter pipeline and connection method thereof
KR100562782B1 (en) Apparatus for connecting pipe
JPS6140543B2 (en)
JPH0426775Y2 (en)
JPH0251689A (en) Tube fitting
JPH07180786A (en) Valve member
JP2002039488A (en) Pipe connecting structure and pipe fitting
JPH0587285A (en) Joint between polyolefine pipe and other pipes
JP2004183793A (en) Relay joint for electric fusion joint
JP2605216B2 (en) Threaded pipe fittings
JPH10169847A (en) Method for fixing electrically welded joint
JPH03265784A (en) Pipe fitting
JPH05141582A (en) Pipe joint
JPH0629591Y2 (en) Branch of resin pipe
JP2530768B2 (en) Connection structure between electric fusion joint and metal tube
JPH0517519Y2 (en)